Medicare Advantage in Middlesex County, Massachusetts
105,854 people in Middlesex County, Massachusetts were enrolled in Medicare Advantage in October 2026, 34.1% of 310,754 eligible beneficiaries (−0.8 pts since October 2025). Point32Health, Inc. is the largest parent organization with 39% of reported enrollment; 19 parent organizations have 11 or more members and the HHI is 2,325 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 26,042 members here are in plans that terminate or leave the county. MA plans offered go from 33 to 33.
Parent organizations in Middlesex County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Point32Health, Inc. | 41,148 | −1,409 | 39.0% |
| UnitedHealth Group, Inc. | 21,876 | −1,606 | 20.8% |
| Blue Cross and Blue Shield of Massachusetts, Inc. | 15,399 | −1,877 | 14.6% |
| CVS Health Corporation | 10,458 | +1,088 | 9.9% |
| CareSource | 5,309 | −10 | 5.0% |
| Mass General Brigham Incorporated | 5,185 | +3,137 | 4.9% |
| Fallon Community Health Plan, Inc. | 2,735 | +343 | 2.6% |
| Molina Healthcare, Inc. | 953 | +77 | 0.9% |
| Eternal Health of Delaware, Inc. | 633 | +379 | 0.6% |
| Cambridge Health Alliance | 604 | +4 | 0.6% |
| Humana Inc. | 375 | +197 | 0.4% |
| Element Care, Inc. | 248 | +46 | 0.2% |
| Elevance Health, Inc. | 219 | +26 | 0.2% |
| NEIGHBORHEALTH CORPORATION | 78 | −12 | under 0.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 58 | −24 | under 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 105,162 beneficiaries in Middlesex County were assigned to 212 Medicare Shared Savings Program ACOs, 73.7% of assignable Original Medicare beneficiaries. Together, roughly 83% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.